202 DOVE ON THE LAW OF STORMS. 
and Inspruck; 113 at Cracow and Dantzic; 11 at Padua; 94 
at Christiania; 8 at Florence; 7 at Tilsit; 6 at Rome, Molfetta 
and Abo; 3 at Petersburg. 
On the 25th December, at 8 p.m.—17 lines at London; 163 t 
at Helston and Apenrade; 16 at Haarlem and Bergen; 15 at — 
Bremen; 14 at Dieppe, Géttingen and Dantzic; 13 at Paris, , 
Gotha, Breslau and Christiania; 12 at Strasburg, Berlin and — 
Cracow; 11 at Turin, Zurich and Augsburg; 10} at Padua; 
10 at Prague; 9 at Tilsit; 8 at Florence; 7 at Molfetta; 4 at 
Petersburg. 
According to the one view,—in which it is considered that the 
atmospheric pressure at a given place being from some cause — 
unusually diminished, an inflowing takes place from all sides,— 
there will be equilibrium between the several particles on a line 
in which the pressure is equally diminished, and the general | 
direction of the wind will be perpendicular to that line. Ac- 
cording to the other view,—in which the complex phenomenon 
is regarded as the consequence of a rotatory movement,—the 
general direction of the wind will be that of the above-named — 
line itself. Thus the two assumptions lead to two directions of 
the wind at right angles to each other. We have therefore next 
to inquire to which assumption the observations correspond. 
From the abovementioned observations, it follows that the 
march of the minimum was from the French coast towards the 
south-west point of Norway, or nearly from Brest to Cape Lin- 
denaes. What was the direction of the wind at the different 
stations in reference to this moving minimum? Was the direc- 
tion fowards the minimum ? or was it tangential to circles having” 
the place of minimum as their common but constantly moving: 
centre? This may be directly tested in the most simple man- 
ner, by laying down on four maps the place of the minimum for 
the four epochs, 6 p.m. 24th December, and 3 a.m., 10 a.m., 
and 8 p.m. 25th December, and then marking on these maps 
the directions of the wind simultaneously observed at the several 
stations. Ifthe arrows on the maps are found to be tangents 
to concentric circles, the actual existence of these circles may 
be assumed, and the directions of the wind which follow from 
such a supposition may be compared with the observations. 
As the march of the minimum is from Brest to Cape Linde- 
naes, France, Italy, Germany, Denmark and Russia are on the 
south-eastern side of the main path of the storm, Ireland, Scot- 
